Document Type and Number:
Japanese Patent JPS57108821
Kind Code:
U
Application Number:
JP18686380U
Publication Date:
July 05, 1982
Filing Date:
December 25, 1980
Export Citation:
International Classes:
B21C35/02; B21C35/04; B23D1/26; (IPC1-7): B23D1/26; B21C35/04
Domestic Patent References:
| JP54039790B | ||||
| JPS5554117A | 1980-04-21 |